| 1. 难度：困难 | |
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--Who______ it be that is knocking at the door? --It ______ be Father, but I’m not sure. A. can; must B. can; may C. must; can D. may; must
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| 2. 难度：困难 | |
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Look at the ground, it is wet. It ________ last night.www.7caiedu.cn A．must have rained B．must rain C．could have rained D．may have rained
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| 3. 难度：困难 | |
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I promised to get there before 5 o’clock, but now the traffic is still so heavy. They _____ for me impatiently. A. may wait B. must be waiting C. could wait D. ought to wait
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| 4. 难度：困难 | |
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I ______ her, but I never could. A. ought to help B. must help C. must have helped D. ought to have helped
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| 5. 难度：困难 | |
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Bobby ______ me your secret, but he meant no harm. A. shouldn’t have told B. should tell C. mustn’t have told D. could tell
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| 6. 难度：困难 | |
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--______ I go home now, sir?www.7caiedu.cn --No, you ______. You should finish the composition first.www.7caiedu.cn A. Might; wouldn’t B. May; had better notwww.7caiedu.cn C. Must; mustn’t D. Need; mustn’t
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| 7. 难度：困难 | |
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--______ he use your bike? --Certainly. Here is the key. A. Shall B. Must C. Will D. Does
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| 8. 难度：困难 | |
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Harry has been reading all day —he ______ be tired. A. should B. has got to C. has to D. must
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| 9. 难度：困难 | |
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It has been announced that candidates _____ remain in their seats until all the papers have been collected. A. can B. will C. may D. shall
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| 10. 难度：困难 | |
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-- Shall I hold the bandage with tape? -- Yes, but you put butter, oil or ointment on burns as they may cause infection. A. in the place, needn’t B. in place, mustn’t C. in the place, can’t D. in place, oughtn’t
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| 11. 难度：困难 | |
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—Where is my dictionary? I remember I put it here yesterday. —You it in the wrong place. A. must put B. should have put C. might put D. might have put
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| 12. 难度：困难 | |
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Liza ___ well not want to go on the trip --- she hates traveling. A. will B. can C. must D. may
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| 13. 难度：困难 | |
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--I’m sorry. I ___________ at you the other day. -- Forget it. I was a bit out of control myself. A. shouldn’t shout B. shouldn’t have shouted C. mustn’t shout D. mustn’t have shouted
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| 14. 难度：困难 | |
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It’s not likely to happen, but if it , we need to be well prepared. A．should B．would C．might D．could
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| 15. 难度：困难 | |
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Service was included in the bill, so you ______ the waiter. It was a waste of money. A. will not tip B. may not tip C. needn’t have tipped D. must not tip
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| 16. 难度：困难 | |
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Judging from his IQ and his present state of study，he be admitted to Tsinghua University this year if nothing special happens． A．should B．shall C．can D．must
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| 17. 难度：困难 | |
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He was having a meeting；otherwise he over to help us． A．would have come B．had come C．should come D．came
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| 18. 难度：困难 | |
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Itbe a good movie—its reviews were very good． A．can B．should C．might D．need
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| 19. 难度：困难 | |
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According to the newly-made traffic regulation，whoever drives through red light be fined at least 200 dollars． A．shall B．may C．would D．should
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| 20. 难度：困难 | |
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I really ________ thank you enough. It’s been an wonderful day. A. needn’t B. should C. must D. cannot
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